The booing occurred after Brown told the first act of the day, a New Orleans brass band called Lagniappe, that she wasn't a fan of brass music. Her comment allegedly led to a massive audience outburst in which besides boos, many yelled phrases like, "go home" and "no respect."
According to TMZ, Brown then leaned toward fellow judge, Howie, for comfort.
Brown, an avid tweeter, made no comments about the diss on her Twitter account. Her only post from Monday's auditions was a photo of the set captioned, "Here we go!!"
Brown joined the “AGT” panel as a judge this season along with fellow newcomer Heidi Klum.
2014: The Year in Music [PHOTOS]